EP1545157B1 - Tube and process for compression-fitting of functional elements in such a tube - Google Patents

Tube and process for compression-fitting of functional elements in such a tube Download PDF

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Publication number
EP1545157B1
EP1545157B1 EP04029778A EP04029778A EP1545157B1 EP 1545157 B1 EP1545157 B1 EP 1545157B1 EP 04029778 A EP04029778 A EP 04029778A EP 04029778 A EP04029778 A EP 04029778A EP 1545157 B1 EP1545157 B1 EP 1545157B1
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EP
European Patent Office
Prior art keywords
side walls
tube
tube according
wall areas
pressurization
Prior art date
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Active
Application number
EP04029778A
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German (de)
French (fr)
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EP1545157A3 (en
EP1545157A2 (en
Inventor
Andreas Hamburger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eichenauer Heizelemente GmbH and Co KG
BorgWarner Ludwigsburg GmbH
Original Assignee
Eichenauer Heizelemente GmbH and Co KG
Beru AG
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Publication of EP1545157A2 publication Critical patent/EP1545157A2/en
Publication of EP1545157A3 publication Critical patent/EP1545157A3/en
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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/42Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/18Arrangement or mounting of grates or heating means
    • F24H9/1854Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863Arrangement or mounting of electric heating means
    • F24H9/1872PTC
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C1/00Details
    • H01C1/01Mounting; Supporting
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017Manufacturing methods or apparatus for heaters
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02Heaters using heating elements having a positive temperature coefficient

Definitions

  • the invention relates to a method for clamping functional elements in a hollow receiving means, such as a tube with two mutually and flat sides of the functional elements opposite, at least partially concave top wall areas. Furthermore, the invention relates to a pipe, in particular for receiving functional elements, such as PTC heating elements, with two mutually and flat sides of the functional elements opposite, at least partially concave top wall areas. Furthermore, the invention relates to uses of such a tube.
  • Electric heaters in which resistance heating elements in the form of PTC elements are used for generating a heating power, are known today in a variety of fields of technology, for example in the automotive industry.
  • the said heaters are used, for example, for heating vehicle interiors, as long as alternative heating methods using the engine cooling water as the heating medium due to insufficient engine heating not yet working efficiently.
  • the electric heater can be carried out both separately be integrated as well as in a flowing through the cooling water fins / tube block, for example, by a part of the cooling water-flowed tubes is replaced by PTC tubes.
  • individual PTC elements are regularly arranged in hollow receiving means, such as profile tubes, which are plastically deformed to clamp the PTC elements by pressurizing their cover walls.
  • two opposing cover walls exert a compressive pressure on the hollow receiving means, so that correspondingly an inner spacing of the cover walls decreases until they come into contact with the PTC elements received in the receiving means and set this.
  • a generic tube for use with an electrical heating element is known from US 4,942,289.
  • This heating element comprises a contact unit formed from at least one PTC element and contact plates resting on both sides thereof and a tubular housing, wherein the housing, when not pressed, has an inner wall facing convexly facing the contact arrangement with a finite radius of curvature.
  • a spring tension is built up, which is present as a pressing force on the contact surfaces of the PTC elements.
  • said heating devices regularly have heat-emitting fins in the form of fins or the like, which are connected to the heating tubes in a manner which is highly thermally conductive.
  • the lamella assembly must take place in a subsequent, additional process step, resulting in disadvantageously long production times and corresponding cost increases.
  • the invention has for its object to provide a method and a profile tube, which can overcome the disadvantages enumerated above.
  • this object is achieved in a method of the type mentioned above in that the functional elements are braced by pressurizing the substantially perpendicular to the concave top wall areas extending side walls.
  • the object is also achieved by a tube, which is characterized by further substantially perpendicular to the concave top wall portions extending further side walls, which are acted upon to reduce a clearance between the retracted top wall portions with a compression pressure.
  • the pressurization or the action of a compressive force is thus substantially perpendicular to the flat sides of the functional elements, exactly perpendicular to its surface normal to the other side walls - if they are flat - and exactly perpendicular to the flat sides of the functional elements stand, which does not have to be, then parallel to the surface normal of the other side walls.
  • the first partially concave preformed top walls are pressed against the functional element, so that this is braced in the pipe.
  • only a small pressing force is required according to the invention for clamping the receiving means (tubes), since no plastic deformation has to be achieved in the pressing direction. Accordingly, the tools to be used are simple.
  • the side walls are pressurized substantially in the direction of their surface normal, wherein accordingly the tube is preferably formed such that the side walls are pressurizable substantially in the direction of their surface normal.
  • the pressurization takes place substantially in the direction of the surface normal of the side walls, in particular, that the forces exerting the pressurization forces have a predominant or main component parallel to the surface normal of the side walls, although the forces are not exactly parallel to the surface normal.
  • the clamping of the functional elements is preferably such that the pressurization reduces a clear distance between the opposing top walls, with regions of the concave top wall areas approaching one another for clamping the functional elements.
  • a distance between partial sections of at least one concave top wall area is reduced by the application of pressure and that between these at least one attachment part, such as a metal lamella or rib, is permanently clamped. It is possible in this way to integrate the attachment of attachment parts in the pressing process.
  • an outwardly widening free space region with essentially an isosceles trapezoidal cross-section is defined prior to pressurization.
  • the free space area is preferably designed to accommodate at least one complementary end area of at least one attachment part, such as a metal lamella or rib.
  • the attachment part is substantially positively enclosed after pressurization by the cover walls of the concave top wall area and held in this way by clamping.
  • the profile tube according to the invention has rib elements in at least one of the cover or side wall regions which preferably have an extension component in the longitudinal direction of the profile tube.
  • the rib elements may also have an extension in cross-section substantially perpendicular to a local course of the cover and / or Have sidewall areas or the top and / or side walls.
  • profile tubes are generally suitable for providing a composite device of a number of profile tubes and connecting connecting parts, wherein the attachment parts are held by the profile tubes, and are preferably used in a radiator with an arrangement of heat-dissipating fins.
  • Fig. 1 shows an extruded, inventive profile tube 1 with a substantially rectangular cross-section.
  • a flat PTC heating element 2 consisting of a PTC resistor 2.1, a contact track 2.2, a ceramic insulation 2.3 and a contact frame 2.4 is arranged inside 1.1 of the profile tube 1.
  • the PTC heating element 2 in particular has flat sides 2a, 2b.
  • the structure of such PTC elements 2 is familiar to the person skilled in the art and is not the subject of this invention per se.
  • the profile tube 1 has top wall portions 1.2, 1.3 which are retracted inwardly relative to a strictly rectangular cross-section of the profile tube 1, i. show a concave training.
  • top wall portions 1.2, 1.3 of the profile tube 1 are outwardly expanding free space areas 1.4 defined, of which in Fig. 1 by way of example only one dashed line is shown.
  • the cover walls 1.5, 1.6 of the profile tube 1 have in the retracted, concave top wall portions 1.2, 1.3 an inner distance a, which is greater than a corresponding dimension a 'between the flat sides 2a, 2b of the PTC element 2.
  • the Profile tube 1 further side walls or side wall portions 1.7, 1.8, which extend substantially perpendicular to the concave top wall portions 1.2, 1.3 and whose clear distance b is greater than a corresponding dimension b 'of the PTC element 2, where: (b-b ')> (a-a').
  • the profile tube 1 also has along its outer contour rib members 3, which are perpendicular to the plane of the drawing, i. extend in the profile longitudinal direction and are aligned in cross section substantially perpendicular to a local extension direction of the cover and side walls 1.5-1.8.
  • the clamping of the PTC element 2 in the interior 1.1 of the profile tube 1 according to the invention is carried out by lateral pressure (arrows P) on the side walls 1.7, 1.8. This will be explained in more detail below with reference to FIGS. 3a, b.
  • FIG. 2a, b show a further possible embodiment of the profile tube 1 according to the invention, here initially (FIG. 2a) as a seamlessly drawn or welded tube with a circular cross section, which, as shown in FIG. 2b, for forming concave top wall regions 1.2, 1.3 (see Fig. 1) is to profile accordingly, for example using a suitable roller system (not shown here).
  • Fig. 3a, b show in detail the already mentioned pressing process by pressurization (arrows P) of the side walls 1.7, 1.8 of the profile tube according to the invention 1.
  • This is according to Fig. 3a, b substantially as already explained in Fig. 1, has but no ribs on.
  • concave top wall portions 1.2, 1.3 formed free spaces 1.4 are used in the subject of Fig. 3a, b respectively neck portions 4 in the form of flat metal fins.
  • a main body 4.1 Starting from a main body 4.1, these have an end region in the form of a projection 4.2, which first tapers conically in a first region 4.2a adjoining the main body 4.1 and subsequently widens slightly conically in a second region 4.2b, so that in FIG Area of a peak 4.2c of the projection 4.2 4.2d corners are formed.
  • a length L of the projection 4.2 is dimensioned larger than a insertion depth T of the top wall portions 1.2, 1.3, so that the attachment part 4 with its projection 4.2 in the free space area 1.4 can be introduced, the tip 4.2c each side wall 1.5, 1.6 touched without the main body 4.1 of the attachment part 4 in turn already with the side walls 1.5, 1.6 of the profile tube 1 comes into contact.
  • FIG. 3b the arrangement of Fig. 3a is shown again after the application of pressure P.
  • the pressing pressure P first causes the pressurized side walls 1.7, 1.8 to move towards each other while reducing their spacing b (FIG. 1).
  • the latter are in this case formed slightly convexly curved to form the largest possible contact surface for heat transfer with the PTC element 2 via its flat sides 2a, 2b on their inner sides 1.5a, 1.6a (cf., Fig. 1, 3a).
  • convexities 1.9 of the cover walls 1.5, 1.6 are formed in the retracted, concave top wall areas 1.2, 1.3, so that the formerly trapezoidal free space area 1.4 (cf., FIGS. 1, 3a) now has undercuts 1.10.
  • FIGS. 4a shows a side view of the profile tube 1 according to the invention according to the Fig. 3a, b with a plurality of mutually parallel aligned attachment parts 4 in the form of metal lamellae.
  • FIGS. 4b, c show sections through a profile tube-lamella arrangement according to FIG. 4a.
  • the embodiments according to FIGS. 4b and 4c differ in that the attachment parts 4 shown in FIG. 4c in the outer region 4.2b of the projection 4.2 have a substantially rectangular bend 4.2e, through which a heat-conducting contact between the attachment parts 4 and the profile tube 1 can be improved.
  • FIGS. 5a, 5b it is shown how a number of profile tubes 1 according to the invention with inserted PTC elements 2 can be connected to an assembled device via an arrangement of attachment parts 4, in the exemplary embodiment shown specifically to a heating element 5.
  • the overall structure of the heating element 5 shown in FIGS. 5a, b can be assembled beforehand and still be kept unstressed by means of a suitable holding tool (not shown). Subsequently, the bracing of the entire heater 5 by pressurizing the side walls 1.7, 1.8 of the profile tubes 1 in a single operation, as shown above with reference to FIGS. 1, 2b, 3a.
  • FIGs 6a, b show a further embodiment of the profile tube 1 according to the invention before or after the pressing (pressurization P, Figure 6a).
  • the concave configuration of the cover walls 1.5, 1.6 results from a cross-sectional two-legged construction with legs 1.5b, 1.5c and 1.6b, 1.6c, which include an obtuse angle ⁇ before pressing.
  • the side walls 1.7, 1.8 and the legs 1.5b, 1.6b are arranged in pairs at a slightly obtuse angle to each other.
  • zakken shame projections 3 ' are formed by the side walls 1.7, 1.8 and the legs 1.5c, 1.6c (Fig. 6a).

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

Method for clamping PTC heating elements etc. in hollow holder (1), such as tube, with two concave ceiling wall region (1.5,1.6) opposite to each other and to flat sides of PTC heating elements (2). PTC heating elements are clamped by pressure application to further side walls, orthogonally to ceiling wall regions. Preferably side walls are pressurised in direction of their surface normal. Pressure application typically reduces spacing of side walls in application direction, with regions of side walls providing clamping of PTC elements. Independent claims are included for tube holding PTC heating elements and its use and heater.

Description

Die Erfindung betrifft ein Verfahren zum Verspannen von Funktionselementen in einem hohlen Aufnahmemittel, wie einem Rohr mit zwei einander und Flachseiten der Funktionselemente gegenüberliegenden, zumindest teilweise konkaven Deckwand-Bereichen. Weiterhin betrifft die Erfindung ein Rohr, insbesondere zur Aufnahme von Funktionselementen, wie PTC-Heizelementen, mit zwei einander und Flachseiten der Funktionselemente gegenüberliegenden, zumindest teilweise konkaven Deckwand-Bereichen. Ferner betrifft die Erfindung Verwendungen eines derartigen Rohres.The invention relates to a method for clamping functional elements in a hollow receiving means, such as a tube with two mutually and flat sides of the functional elements opposite, at least partially concave top wall areas. Furthermore, the invention relates to a pipe, in particular for receiving functional elements, such as PTC heating elements, with two mutually and flat sides of the functional elements opposite, at least partially concave top wall areas. Furthermore, the invention relates to uses of such a tube.

Elektrische Heizeinrichtungen, bei denen zum Erzeugen einer Heizleistung Widerstandsheizelemente in Form von PTC-Elementen zum Einsatz kommen, sind heutzutage auf vielfältigen Gebieten der Technik, beispielsweise im Automobilbau, bekannt. Dort werden die genannten Heizeinrichtungen beispielsweise zum Beheizen von Fahrzeuginnenräumen verwendet, solange alternative Heizverfahren unter Verwendung des Motorkühlwassers als Heizmedium aufgrund unzureichender Motorerwärmung noch nicht effizient arbeiten. Dabei kann die elektrische Heizeinrichtung sowohl separat ausgeführt sein als auch in einen vom Kühlwasser durchflossenen Rippen/Rohrblock integriert sein, indem beispielsweise ein Teil der kühlwasserdurchflossenen Rohre durch PTC-Rohre ersetzt ist. Bei derartigen Heizeinrichtungen werden regelmäßig einzelne PTC-Elemente in hohlen Aufnahmemitteln, wie Profilrohren, angeordnet, die zum Verspannen der PTC-Elemente durch Druckbeaufschlagung ihrer Deckwände plastisch verformt werden. Zu diesem Zweck wird nach dem Stand der Technik mittels eines geeigneten Werkzeugs von zwei einander gegenüberliegenden Deckwände ein Verpressdruck auf das hohle Aufnahmemittel ausgeübt, so dass entsprechend ein innerer Abstand der Deckwände abnimmt, bis diese mit den in dem Aufnahmemittel aufgenommenen PTC-Elementen in Anlage treten und diese festlegen.Electric heaters, in which resistance heating elements in the form of PTC elements are used for generating a heating power, are known today in a variety of fields of technology, for example in the automotive industry. There, the said heaters are used, for example, for heating vehicle interiors, as long as alternative heating methods using the engine cooling water as the heating medium due to insufficient engine heating not yet working efficiently. In this case, the electric heater can be carried out both separately be integrated as well as in a flowing through the cooling water fins / tube block, for example, by a part of the cooling water-flowed tubes is replaced by PTC tubes. With such heaters, individual PTC elements are regularly arranged in hollow receiving means, such as profile tubes, which are plastically deformed to clamp the PTC elements by pressurizing their cover walls. For this purpose, according to the state of the art, by means of a suitable tool, two opposing cover walls exert a compressive pressure on the hollow receiving means, so that correspondingly an inner spacing of the cover walls decreases until they come into contact with the PTC elements received in the receiving means and set this.

Ein gattungsgemäßes Rohr zur Verwendung bei einem elektrischen Heizelement ist aus der US 4,942,289 bekannt. Dieses Heizelement umfasst eine aus mindestens einem PTC-Element und auf diesem beidseitig aufliegenden Kontaktplatten gebildete Kontakteinheit und ein rohrförmiges Gehäuse, wobei das Gehäuse in unverpreßtem Zustand eine der Kontaktanordnung konvex zugewandte Innenwandung mit einem endlichen Krümmungsradius aufweist. Bei der anschließenden mechanischen Verpressung wird eine Federspannung aufgebaut, welche als Preßkraft an den Kontaktflächen der PTC-Elemente ansteht.A generic tube for use with an electrical heating element is known from US 4,942,289. This heating element comprises a contact unit formed from at least one PTC element and contact plates resting on both sides thereof and a tubular housing, wherein the housing, when not pressed, has an inner wall facing convexly facing the contact arrangement with a finite radius of curvature. In the subsequent mechanical pressing a spring tension is built up, which is present as a pressing force on the contact surfaces of the PTC elements.

Dabei ist insbesondere als nachteilig anzusehen, dass nach einer Entlastung der eingesetzten Presse die verformten Deckwände des Aufnahmemittels aufgrund einer vorhandenen Teilelastizität zwangsläufig um ein gewisses Maß zurückfedern, so dass eine Haltekraft für die PTC-Elemente abnimmt. Weiterhin sind zum plastischen Verformen der Aufnahmemittel vergleichsweise hohe Presskräfte in einer äquivalenten Größenordnung von 40 t erforderlich, was weiterhin einen komplexen Aufbau der einzusetzenden Presswerkzeuge bedingt.It is to be regarded in particular as disadvantageous that after a relief of the press used, the deformed cover walls of the receiving means inevitably spring back to a certain extent due to an existing partial elasticity, so that a holding force for the PTC elements decreases. Furthermore, for plastic deformation of the receiving means comparatively high pressing forces in an equivalent order of magnitude of 40 tons required, which further requires a complex structure of the pressing tools to be used.

Darüber hinaus weisen die genannten Heizeinrichtungen zusätzlich zu den vorstehend beschriebenen Heizrohren (Aufnahmemittel und PTC-Elemente) regelmäßig Wärmeabgabe-Rippen in Form von Lamellen oder dergleichen auf, die gut wärmeleitend mit den Heizrohren verbunden sind. Bei den vorbekannten Heizeinrichtungen bzw. Verfahren zu deren Herstellung muss die Lamellenmontage in einem nachgeschalteten, zusätzlichen Prozessschritt erfolgen, so dass sich in nachteiliger Weise lange Fertigungszeiten und entsprechende Kostenerhöhungen ergeben.In addition, in addition to the above-described heating tubes (receiving means and PTC elements), said heating devices regularly have heat-emitting fins in the form of fins or the like, which are connected to the heating tubes in a manner which is highly thermally conductive. In the case of the previously known heating devices or methods for their production, the lamella assembly must take place in a subsequent, additional process step, resulting in disadvantageously long production times and corresponding cost increases.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und ein Profilrohr anzugeben, mit der sich die vorstehend aufgezählte Nachteile überwinden lassen.The invention has for its object to provide a method and a profile tube, which can overcome the disadvantages enumerated above.

Erfindungsgemäß wird diese Aufgabe in einem Verfahren der eingangs genannten Art dadurch gelöst, dass die Funktionselemente durch Druckbeaufschlagen der sich im Wesentlichen senkrecht zu den konkaven Deckwand-Bereichen erstreckenden Seitenwände verspannt werden. Die Aufgabe wird darüber hinaus gelöst durch ein Rohr, welches gekennzeichnet ist durch sich im Wesentlichen senkrecht zu den konkaven Deckwand-Bereichen erstreckende weitere Seitenwände, die zur Verringerung eines lichten Abstands zwischen den eingezogenen Deckwand-Bereichen mit einem Verpressdruck beaufschlagbar sind.According to the invention this object is achieved in a method of the type mentioned above in that the functional elements are braced by pressurizing the substantially perpendicular to the concave top wall areas extending side walls. The object is also achieved by a tube, which is characterized by further substantially perpendicular to the concave top wall portions extending further side walls, which are acted upon to reduce a clearance between the retracted top wall portions with a compression pressure.

Die Druckbeaufschlagung bzw. das Einwirken einer Druckkraft erfolgt damit im wesentlichen senkrecht zu deren Flachseiten der Funktionselemente, genau senkrecht zu ihrer Flächennormale auf die weiteren Seitenwände - wenn diese eben sind - und genau senkrecht zu den Flachseiten der Funktionselemente stehen, was nicht sein muß, dann parallel zur Flächennormale der weiteren Seitenwände. Durch diese Druck- bzw. Krafteinwirkung werden die zunächst teilweise konkav vorgeformten Deckwände gegen das Funktionselement gedrückt, so daß dieses im Rohr verspannt wird.
Auf diese Weise ist erfindungsgemäß zum Verspannen der Aufnahmemittel (Rohre) nur eine geringe Presskraft erforderlich, da in Pressrichtung keine plastische Verformung erzielt werden muss. Entsprechend sind die zu verwendenden Werkzeuge einfach aufgebaut.
The pressurization or the action of a compressive force is thus substantially perpendicular to the flat sides of the functional elements, exactly perpendicular to its surface normal to the other side walls - if they are flat - and exactly perpendicular to the flat sides of the functional elements stand, which does not have to be, then parallel to the surface normal of the other side walls. By this pressure or force the first partially concave preformed top walls are pressed against the functional element, so that this is braced in the pipe.
In this way, only a small pressing force is required according to the invention for clamping the receiving means (tubes), since no plastic deformation has to be achieved in the pressing direction. Accordingly, the tools to be used are simple.

Gemäß einer bevorzugten Ausgestaltung des Verfahrens ist dabei vorgesehen, dass die Seitenwände im Wesentlichen in Richtung ihrer Flächennormale druckbeaufschlagt werden, wobei demgemäß das Rohr vorzugsweise derart ausgebildet ist, dass die Seitenwände im Wesentlichen in Richtung zu ihrer Flächennormale druckbeaufschlagbar sind. Die Aussage, dass die Druckbeaufschlagung im Wesentlichen in Richtung der Flächennormale der Seitenwände erfolgt, beinhaltet insbesondere, dass die die Druckbeaufschlagung ausübenden Kräfte eine überwiegende oder Haupt-Komponente parallel zur Flächennormale der Seitenwände haben, wenn auch die Kräfte nicht exakt parallel zur Flächennormale gerichtet sind.According to a preferred embodiment of the method, it is provided that the side walls are pressurized substantially in the direction of their surface normal, wherein accordingly the tube is preferably formed such that the side walls are pressurizable substantially in the direction of their surface normal. The statement that the pressurization takes place substantially in the direction of the surface normal of the side walls, in particular, that the forces exerting the pressurization forces have a predominant or main component parallel to the surface normal of the side walls, although the forces are not exactly parallel to the surface normal.

Im Zuge des erfindungsgemäßen Verfahrens erfolgt das Verspannen der Funktionselemente vorzugsweise dergestalt, dass durch die Druckbeaufschlagung ein lichter Abstand zwischen den gegenüberliegenden Deckwänden verringert wird, wobei sich Bereiche der konkaven Deckwand-Bereiche zum Einklemmen der Funktionselemente aneinander annähern. Im Zuge einer äußerst bevorzugten Weiterbildung ist vorgesehen, dass durch die Druckbeaufschlagung ein Abstand zwischen Teilabschnitten jeweils wenigstens eines konkaven Deckwand-Bereichs verringert und zwischen diesen wenigstens ein Ansatzteil, wie eine Metall-Lamelle oder -Wellrippe dauerhaft eingeklemmt wird. Es ist auf diese Weise möglich, das Befestigen von Ansatzteilen in den Verpressvorgang zu integrieren.In the course of the inventive method, the clamping of the functional elements is preferably such that the pressurization reduces a clear distance between the opposing top walls, with regions of the concave top wall areas approaching one another for clamping the functional elements. During a It is provided in an extremely preferred embodiment that a distance between partial sections of at least one concave top wall area is reduced by the application of pressure and that between these at least one attachment part, such as a metal lamella or rib, is permanently clamped. It is possible in this way to integrate the attachment of attachment parts in the pressing process.

In Weiterbildung des erfindungsgemäßen Profilrohrs ist vorgesehen, dass durch Deckwände der eingezogenen Deckwand-Bereiche vor einer Druckbeaufschlagung ein sich nach außen erweiternder freier Raumbereich mit im Wesentlichen einem gleichschenkligen Trapez entsprechenden Querschnitt definiert ist. Der freie Raumbereich ist vorzugsweise zum Aufnehmen zumindest eines komplementären Endbereichs wenigstens eines Ansatzteils, wie einer Metall-Lamelle oder -Wellrippe, ausgebildet. In einer äußerst bevorzugten Weiterbildung des erfindungsgemäßen Profilrohrs ist das Ansatzteil nach erfolgter Druckbeaufschlagung durch die Deckwände des konkaven Deckwand-Bereichs im Wesentlichen formschlüssig umgeben und auf diese Weise klemmend gehalten. Somit ist eine unter Verwendung der erfindungsgemäßen Profilrohre herzustellende zusammengesetzte Vorrichtung, wie eine Heizeinrichtung, mit den bereits angesprochenen Wärmeübertragungs-Rippen im Zuge des Verspannens der PTC-Elemente in nur einem Verfahrensschritt herstellbar.In a further development of the profiled tube according to the invention, it is provided that, by means of cover walls of the retracted cover wall regions, an outwardly widening free space region with essentially an isosceles trapezoidal cross-section is defined prior to pressurization. The free space area is preferably designed to accommodate at least one complementary end area of at least one attachment part, such as a metal lamella or rib. In an extremely preferred embodiment of the profile tube according to the invention, the attachment part is substantially positively enclosed after pressurization by the cover walls of the concave top wall area and held in this way by clamping. Thus, a composite device to be produced using the profile tubes according to the invention, such as a heater, with the already mentioned heat transfer ribs in the course of bracing the PTC elements in only one process step produced.

Zum sicheren Halten der Ansatzteile kann weiterhin vorgesehen sein, dass die Deckwände der eingezogenen Deckwand-Bereiche nach erfolgter Druckbeaufschlagung Hinterschneidungen zum Aufnehmen komplementärer Eckbereiche des Ansatzteils definieren. Aufgrund der geringen erforderlichen Presskräfte können in weiterer Abgrenzung zum Stand der Technik auch in Längsrichtung verrippte Profile verarbeitet werden, die bislang regelmäßig in aufwändiger Weise aus zwei getrennten Halbprofilen aufgebaut wurden. Entsprechend weist das erfindungsgemäße Profilrohr in einer bevorzugten Weiterbildung in wenigstens einem der Deck- oder Seitenwand-Bereiche Rippenelemente auf, die vorzugsweise eine Erstreckungskomponente in Längsrichtung des Profilrohrs aufweisen. Zwecks optimaler Wärmeabgabe können die Rippenelemente zudem im Querschnitt eine Erstreckung im Wesentlichen senkrecht zu einem lokalen Verlauf der Deck- und/oder Seitenwand-Bereiche bzw. der Deck- und/oder Seitenwände aufweisen.For secure holding of the attachment parts can furthermore be provided that define the cover walls of the retracted top wall areas after pressurization undercuts for receiving complementary corner regions of the attachment part. Due to the low pressing forces required, in addition to the prior art, longitudinally ribbed profiles can be processed, which have hitherto been built up regularly in a complex manner from two separate half profiles. Correspondingly, in a preferred development, the profile tube according to the invention has rib elements in at least one of the cover or side wall regions which preferably have an extension component in the longitudinal direction of the profile tube. For optimal heat dissipation, the rib elements may also have an extension in cross-section substantially perpendicular to a local course of the cover and / or Have sidewall areas or the top and / or side walls.

Die vorstehend beschriebenen Profilrohre eignen sich allgemein zum Schaffen einer zusammengesetzten Vorrichtung aus einer Anzahl von Profilrohren und diese verbindenden Ansatzteilen, wobei die Ansatzteile durch die Profilrohre gehalten sind, und finden bevorzugt in einem Heizkörper mit einer Anordnung von Wärmeabgabe-Rippen Verwendung.The above-described profile tubes are generally suitable for providing a composite device of a number of profile tubes and connecting connecting parts, wherein the attachment parts are held by the profile tubes, and are preferably used in a radiator with an arrangement of heat-dissipating fins.

Weitere Eigenschaften und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnungen. Es zeigen:

Fig. 1
einen Querschnitt durch ein erfindungsgemäßes Profilrohr mit eingebrachtem PTC-Heizelement vor dem Verpressen;
Fig. 2a
einen weiteren möglichen Querschnitt eines erfindungsgemäßen Profilrohrs;
Fig. 2b
eine weitere Querschnittsansicht des Profilrohrs gemäß Fig. 2a mit eingezogenen Deckwand-Bereichen und eingebrachtem PTC-Element ;
Fig. 3a
ein erfindungsgemäßes Profilrohr mit eingebrachtem PTC-Element und Ansatzteilen vor dem Verpressen;
Fig. 3b
das Profilrohr der Fig. 3a nach erfolgtem Verpressen;
Fig. 4a
eine Seitenansicht des erfindungsgemäßen Profilrohrs gemäß der Fig. 3b;
Fig. 4b, c
Längsschnitte durch alternative Ausgestaltungen eines erfindungsgemäßen Profilrohrs gemäß der Fig. 3b;
Fig. 5a
einen Querschnitt durch einen unter Verwendung erfindungsgemäßer Profilrohre aufgebauten Heizkörper;
Fig. 5b
eine Seitenansicht des Heizkörpers der Fig. 5a; und
Fig. 6a,b
einen weiteren möglichen Querschnitt eines erfindungsgemäßen Profilrohrs vor bzw. nach dem Verpressen.
Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the drawings. Show it:
Fig. 1
a cross section through an inventive profile tube with inserted PTC heating element before pressing;
Fig. 2a
a further possible cross section of a profile tube according to the invention;
Fig. 2b
a further cross-sectional view of the profile tube of Figure 2a with retracted top wall areas and incorporated PTC element.
Fig. 3a
an inventive profile tube with incorporated PTC element and attachment parts before compression;
Fig. 3b
the profile tube of Figure 3a after completion of pressing.
Fig. 4a
a side view of the profile tube according to the invention according to FIG. 3b;
Fig. 4b, c
Longitudinal sections through alternative embodiments of a profile tube according to the invention according to FIG. 3b;
Fig. 5a
a cross section through a constructed using profile tubes according to the invention radiator;
Fig. 5b
a side view of the radiator of Fig. 5a; and
Fig. 6a, b
a further possible cross section of a profile tube according to the invention before or after the pressing.

Die Erfindung wird nachfolgend anhand einer Anzahl von Ausführungsbeispielen beschrieben, die sich speziell in Form von auf Profilrohren für eine Verwendung in elektrischen Heizeinrichtungen beziehen. Es sei jedoch betont, dass das erfindungsgemäße Verfahren bzw. das erfindungsgemäße Profilrohr nicht auf derartige Anwendungen beschränkt sind, sondern sich generell überall dort einsetzen lassen, wo Funktionselemente im Innern eines hohlen Aufnahmemittels verspannt werden sollen.The invention will be described in the following with reference to a number of exemplary embodiments, which relate in particular in the form of to profile tubes for use in electric heaters. However, it should be emphasized that the method according to the invention or the profile tube according to the invention are not limited to such applications, but can generally be used wherever functional elements are to be clamped inside a hollow receiving means.

Die Fig. 1 zeigt ein stranggepresstes, erfindungsgemäßes Profilrohr 1 mit im Wesentlichen rechteckförmigem Querschnitt. Im Innern 1.1 des Profilrohrs 1 ist ein flaches PTC-Heizelement 2 bestehend aus einem PTC-Widerstand 2.1, einer Kontaktbahn 2.2, einer keramischen Isolierung 2.3 und einem Kontaktrahmen 2.4 angeordnet. Das PTC-Heizelement 2 besitzt insbesondere Flachseiten 2a, 2b. Der Aufbau derartiger PTC-Elemente 2 ist dem Fachmann geläufig und an sich nicht Gegenstand dieser Erfindung.Fig. 1 shows an extruded, inventive profile tube 1 with a substantially rectangular cross-section. Inside 1.1 of the profile tube 1, a flat PTC heating element 2 consisting of a PTC resistor 2.1, a contact track 2.2, a ceramic insulation 2.3 and a contact frame 2.4 is arranged. The PTC heating element 2 in particular has flat sides 2a, 2b. The structure of such PTC elements 2 is familiar to the person skilled in the art and is not the subject of this invention per se.

Das erfindungsgemäße Profilrohr 1 weist Deckwand-Bereiche 1.2, 1.3 auf, die gegenüber einem streng rechteckförmigen Querschnitt des Profilrohrs 1 nach innen eingezogen sind, d.h. eine konkave Ausbildung zeigen. Durch die eingezogenen Deckwand-Bereiche 1.2, 1.3 des Profilrohrs 1 sind sich nach außen erweiternde freie Raumbereiche 1.4 definiert, von denen in der Fig. 1 exemplarisch nur einer gestrichelt dargestellt ist. Die Deckwände 1.5, 1.6 des Profilrohrs 1 weisen in den eingezogenen, konkaven Deckwand-Bereichen 1.2, 1.3 einen inneren Abstand a auf, der größer ist als eine entsprechende Abmessung a' zwischen den Flachseiten 2a, 2b des PTC-Elements 2. Weiterhin besitzt das Profilrohr 1 weitere Seitenwände bzw. Seitenwand-Bereiche 1.7, 1.8, die sich im Wesentlichen senkrecht zu den konkaven Deckwand-Bereichen 1.2, 1.3 erstrecken und deren lichter Abstand b größer ist als eine entsprechende Abmessung b' des PTC-Elements 2, wobei gilt: (b-b')>(a-a').The profile tube 1 according to the invention has top wall portions 1.2, 1.3 which are retracted inwardly relative to a strictly rectangular cross-section of the profile tube 1, i. show a concave training. By retracted top wall portions 1.2, 1.3 of the profile tube 1 are outwardly expanding free space areas 1.4 defined, of which in Fig. 1 by way of example only one dashed line is shown. The cover walls 1.5, 1.6 of the profile tube 1 have in the retracted, concave top wall portions 1.2, 1.3 an inner distance a, which is greater than a corresponding dimension a 'between the flat sides 2a, 2b of the PTC element 2. Furthermore, the Profile tube 1 further side walls or side wall portions 1.7, 1.8, which extend substantially perpendicular to the concave top wall portions 1.2, 1.3 and whose clear distance b is greater than a corresponding dimension b 'of the PTC element 2, where: (b-b ')> (a-a').

Beim gezeigten Ausführungsbeispiel der Fig. 1 weist das erfindungsgemäße Profilrohr 1 außerdem entlang seiner äußeren Kontur Rippenelemente 3 auf, die sich senkrecht zur Zeichenebene, d.h. in Profillängsrichtung erstrecken und dabei im Querschnitt im Wesentlichen senkrecht zu einer lokalen Erstreckungsrichtung der Deck- und Seitenwände 1.5-1.8 ausgerichtet sind.In the illustrated embodiment of Fig. 1, the profile tube 1 according to the invention also has along its outer contour rib members 3, which are perpendicular to the plane of the drawing, i. extend in the profile longitudinal direction and are aligned in cross section substantially perpendicular to a local extension direction of the cover and side walls 1.5-1.8.

Das Verspannen des PTC-Elements 2 im Innern 1.1 des erfindungsgemäßen Profilrohrs 1 erfolgt durch seitlichen Druck (Pfeile P) auf die Seitenwände 1.7, 1.8. Dies wird nachfolgend anhand der Fig. 3a, b noch näher erläutert.The clamping of the PTC element 2 in the interior 1.1 of the profile tube 1 according to the invention is carried out by lateral pressure (arrows P) on the side walls 1.7, 1.8. This will be explained in more detail below with reference to FIGS. 3a, b.

Die Fig. 2a, b zeigen eine weitere mögliche Ausgestaltung des erfindungsgemäßen Profilrohrs 1, hier zunächst (Fig. 2a) als nahtlos gezogenes oder geschweißtes Rohr mit kreisförmigem Querschnitt, das, wie in Fig. 2b gezeigt, zur Ausbildung konkaver Deckwand-Bereiche 1.2, 1.3 (vgl. Fig. 1) entsprechend zu profilieren ist, beispielsweise unter Verwendung eines geeigneten Walzensystems (hier nicht dargestellt).2a, b show a further possible embodiment of the profile tube 1 according to the invention, here initially (FIG. 2a) as a seamlessly drawn or welded tube with a circular cross section, which, as shown in FIG. 2b, for forming concave top wall regions 1.2, 1.3 (see Fig. 1) is to profile accordingly, for example using a suitable roller system (not shown here).

Die Fig. 3a, b zeigen detailliert den bereits angesprochenen Verpressvorgang durch Druckbeaufschlagung (Pfeile P) der Seitenwände 1.7, 1.8 des erfindungsgemäßen Profilrohrs 1. Dieses ist gemäß der Fig. 3a, b im Wesentlichen wie bereits in der Fig. 1 erläutert ausgebildet, weist jedoch keine Rippenelemente auf. In die im Bereich der eingezogenen, konkaven Deckwand-Bereiche 1.2, 1.3 gebildeten Freiräume 1.4 (vgl. Fig. 1) sind beim Gegenstand der Fig. 3a, b jeweils Ansatzteile 4 in Form flacher Metall-Lamellen eingesetzt. Diese weisen ausgehend von einem Hauptkörper 4.1 einen Endbereich in Form eines Vorsprungs 4.2 auf, der sich zunächst in einem sich an den Hauptkörper 4.1 anschließenden ersten Bereich 4.2a konisch verjüngt und sich anschließend in einem zweiten Bereich 4.2b wiederum leicht konisch verbreitert, so dass im Bereich einer Spitze 4.2c des Vorsprungs 4.2 Ecken 4.2d gebildet sind. Eine Länge L des Vorsprungs 4.2 ist dabei größer bemessen als eine Einzugstiefe T der Deckwand-Bereiche 1.2, 1.3, so dass das Ansatzteil 4 mit seinem Vorsprung 4.2 in den freien Raumbereich 1.4 einbringbar ist, wobei die Spitze 4.2c jeweils die Seitenwand 1.5, 1.6 berührt, ohne dass der Hauptkörper 4.1 des Ansatzteils 4 seinerseits bereits mit den Seitenwänden 1.5, 1.6 des Profilrohrs 1 in Anlage tritt.Fig. 3a, b show in detail the already mentioned pressing process by pressurization (arrows P) of the side walls 1.7, 1.8 of the profile tube according to the invention 1. This is according to Fig. 3a, b substantially as already explained in Fig. 1, has but no ribs on. In the area of the retracted, concave top wall portions 1.2, 1.3 formed free spaces 1.4 (see Fig. 1) are used in the subject of Fig. 3a, b respectively neck portions 4 in the form of flat metal fins. Starting from a main body 4.1, these have an end region in the form of a projection 4.2, which first tapers conically in a first region 4.2a adjoining the main body 4.1 and subsequently widens slightly conically in a second region 4.2b, so that in FIG Area of a peak 4.2c of the projection 4.2 4.2d corners are formed. A length L of the projection 4.2 is dimensioned larger than a insertion depth T of the top wall portions 1.2, 1.3, so that the attachment part 4 with its projection 4.2 in the free space area 1.4 can be introduced, the tip 4.2c each side wall 1.5, 1.6 touched without the main body 4.1 of the attachment part 4 in turn already with the side walls 1.5, 1.6 of the profile tube 1 comes into contact.

In der Fig. 3b ist die Anordnung der Fig. 3a nochmals nach erfolgter Druckbeaufschlagung P gezeigt. Der Verpressdruck P bewirkt zunächst, dass sich die druckbeaufschlagten Seitenwände 1.7, 1.8 unter Verminderung ihres Abstands b (Fig. 1) aufeinander zu bewegen. Zugleich vertieft sich aufgrund von in den Deckwänden 1.5, 1.6 wirksamen, jeweils nach innen gerichteten Kräften der Einzug in den Deckwand-Bereichen 1.2, 1.3, bis a=a' (Fig. 1), so dass das PTC-Element 2 im Innern 1.1 des Profilrohrs 1 über seine Flachseiten 2a, 2b zwischen den Deckwänden 1.5, 1.6 eingeklemmt und verspannt wird. Letztere sind hierbei zum Ausbilden einer möglichst großen Kontaktfläche für einen Wärmeübergang mit dem PTC-Element 2 über dessen Flachseiten 2a, 2b auf ihren Innenseiten 1.5a, 1.6a leicht konvex gewölbt ausgeformt (vgl. Fig. 1, 3a). Zugleich bilden sich in den eingezogenen, konkaven Deckwand-Bereichen 1.2, 1.3 Auswölbungen 1.9 der Deckwände 1.5, 1.6, so dass der ehemals trapezförmige freie Raumbereich 1.4 (vgl. Fig. 1, 3a) nunmehr Hinterschneidungen 1.10 aufweist. Daraus ergibt sich ein in der Fig. 3b dargestelltes formschlüssiges Ineinandergreifen des Ansatzteils 4 im Bereich des Vorsprungs 4.2 (Ecken 4.2d) und der Auswölbungen 1.9 bzw. Hinterschneidungen 1.10 in den Deckwand-Bereichen 1.2, 1.3, so dass das Ansatzteil 4 klemmend am Profilrohr 1 gehalten ist. Der in der Fig. 3b weiterhin erkennbare leicht S-förmige Verlauf der Deckwände 1.5, 1.6 im Bereich der Auswölbung 1.9 bzw. Hinterschneidung 1.10 ermöglicht aufgrund einer gewissen Federwirkung zudem ein Ausgleichen von Höhenunterschieden und/oder Toleranzen sowohl des PTC-Elements 2 als auch des Profilrohrs 1.In Fig. 3b, the arrangement of Fig. 3a is shown again after the application of pressure P. The pressing pressure P first causes the pressurized side walls 1.7, 1.8 to move towards each other while reducing their spacing b (FIG. 1). At the same time due to effective in the top walls 1.5, 1.6 each inwardly directed forces of the indentation in the top wall areas 1.2, 1.3, until a = a 'deepens (Fig. 1), so that the PTC element 2 inside 1.1 of the profile tube 1 via its flat sides 2a, 2b between the top walls 1.5, 1.6 is clamped and clamped. The latter are in this case formed slightly convexly curved to form the largest possible contact surface for heat transfer with the PTC element 2 via its flat sides 2a, 2b on their inner sides 1.5a, 1.6a (cf., Fig. 1, 3a). At the same time, convexities 1.9 of the cover walls 1.5, 1.6 are formed in the retracted, concave top wall areas 1.2, 1.3, so that the formerly trapezoidal free space area 1.4 (cf., FIGS. 1, 3a) now has undercuts 1.10. This results in a form-fitting engagement of the attachment part 4 in the area of the projection 4.2 (corners 4.2d) and the bulges 1.9 or undercuts 1.10 in the top wall areas 1.2, 1.3, as shown in FIG. 3b, so that the attachment part 4 clamps on the profile tube 1 is held. The slightly S-shaped course of the cover walls 1.5, 1.6 in the region of the bulge 1.9 or undercut 1.10, which is also recognizable in FIG. 3b, also makes it possible to compensate for height differences and / or tolerances of both the PTC element 2 and of the spring due to a certain spring effect Profile tube 1.

Aufgrund der in den Fig. 1, 2b, 3a gezeigten vorgeformten Einziehung der Deckwände 1.5, 1.6 des Profilrohrs 1 ist im Rahmen der Erfindung ein gegenüber vorbekannten Verfahren deutlich verringerter Druck P ausreichend, um die in Fig. 3b gezeigte Verbindung zwischen den Ansatzteilen 4 und dem Profilrohr 1 herzustellen, wobei zudem das Verspannen der PTC-Elemente 2 und die Montage der Ansatzteile 4 in ein und demselben Arbeitsschritt erfolgen. Der bereits erwähnte S-förmige Verlauf der Deckwände 1.5, 1.6 nach erfolgter Druckbeaufschlagung P bewirkt weiterhin, dass sich das erfindungsgemäße Profilrohr 1 nach Wegfall der Druckbeaufschlagung P, d.h. nach Entfernen eines entsprechenden Presswerkzeugs (nicht gezeigt) aufgrund einer im Material gespeicherten Spannkraft nicht mehr selbsttätig öffnen kann (Selbsthemmung). Auf diese Weise wird ein wesentlicher der eingangs aufgelisteten Nachteile entsprechender vorbekannter Verfahren bzw. Vorrichtungen sicher vermieden.Due to the preformed confiscation of the cover walls 1.5, 1.6 of the profiled tube 1 shown in FIGS. 1, 2b, 3a, in the context of the invention, a significantly reduced pressure P compared with previously known methods is sufficient for the connection between the attachment parts 4 and 3 shown in FIG to produce the profile tube 1, wherein also the distortion of the PTC elements 2 and the assembly of the attachment parts 4 done in one and the same step. The already mentioned S-shaped course of the cover walls 1.5, 1.6 after pressurization P further causes the profile tube 1 according to the invention after elimination of the pressurization P, ie after removal of a corresponding pressing tool (not shown) due to a stored clamping force in the material no longer automatically can open (self-locking). In this way, a significant of the initially listed disadvantages of corresponding previously known methods or devices is reliably avoided.

Die Fig. 4a zeigt eine Seitenansicht des erfindungsgemäßen Profilrohrs 1 gemäß den Fig. 3a, b mit einer Mehrzahl von jeweils parallel zueinander ausgerichteten Ansatzteilen 4 in Form von Metall-Lamellen. Die Fig. 4b, c zeigen Schnitte durch eine Profilrohr-Lamellen-Anordnung gemäß der Fig. 4a. Die Ausgestaltungen gemäß der Fig. 4b und 4c unterscheiden sich dahingehend, dass die in der Fig. 4c gezeigten Ansatzteile 4 im äußeren Bereich 4.2b des Vorsprungs 4.2 eine im Wesentlichen rechtwinklige Abbiegung 4.2e aufweisen, durch die sich ein wärmeleitender Kontakt zwischen den Ansatzteilen 4 und dem Profilrohr 1 verbessern lässt.4a shows a side view of the profile tube 1 according to the invention according to the Fig. 3a, b with a plurality of mutually parallel aligned attachment parts 4 in the form of metal lamellae. FIGS. 4b, c show sections through a profile tube-lamella arrangement according to FIG. 4a. The embodiments according to FIGS. 4b and 4c differ in that the attachment parts 4 shown in FIG. 4c in the outer region 4.2b of the projection 4.2 have a substantially rectangular bend 4.2e, through which a heat-conducting contact between the attachment parts 4 and the profile tube 1 can be improved.

In den Fig. 5a, 5b ist gezeigt, wie eine Anzahl von erfindungsgemäßen Profilrohren 1 mit eingesetzten PTC-Elementen 2 über eine Anordnung von Ansatzteilen 4 zu einer zusammengesetzten Vorrichtung, beim gezeigten Ausführungsbeispiel speziell einem Heizkörper 5 verbindbar ist. Verfahrenstechnisch kann der in den Fig. 5a, b gezeigte Gesamtaufbau des Heizkörpers 5 vorab zusammengestellt und mittels eines geeigneten Haltewerkzeugs (nicht gezeigt) noch unverspannt gehalten werden. Anschließend erfolgt das Verspannen des gesamten Heizkörpers 5 durch Druckbeaufschlagung der Seitenwände 1.7, 1.8 der Profilrohre 1 in einem einzigen Arbeitsgang, wie vorstehend anhand der Fig. 1, 2b, 3a gezeigt.In FIGS. 5a, 5b it is shown how a number of profile tubes 1 according to the invention with inserted PTC elements 2 can be connected to an assembled device via an arrangement of attachment parts 4, in the exemplary embodiment shown specifically to a heating element 5. In terms of process technology, the overall structure of the heating element 5 shown in FIGS. 5a, b can be assembled beforehand and still be kept unstressed by means of a suitable holding tool (not shown). Subsequently, the bracing of the entire heater 5 by pressurizing the side walls 1.7, 1.8 of the profile tubes 1 in a single operation, as shown above with reference to FIGS. 1, 2b, 3a.

Schließlich zeigen die Fig. 6a,b eine weitere Ausgestaltung des erfindungsgemäßen Profilrohrs 1 vor bzw. nach dem Verpressen (Druckbeaufschlagung P; Fig. 6a). Die konkave Ausbildung der Deckwände 1.5, 1.6 resultiert aus einem im Querschnitt zweischenkligen Aufbau mit Schenkeln 1.5b, 1.5c bzw. 1.6b, 1.6c, die vor dem Verpressen einen stumpfen Winkel α einschließen. Die Seitenwände 1.7, 1.8 und die Schenkel 1.5b, 1.6b sind dabei paarweise in einem leicht stumpfen Winkel zueinander angeordnet. Dadurch sind durch die Seitenwände 1.7, 1.8 und die Schenkel 1.5c, 1.6c zakkenartige Vorsprünge 3' gebildet (Fig. 6a).Finally, Figures 6a, b show a further embodiment of the profile tube 1 according to the invention before or after the pressing (pressurization P, Figure 6a). The concave configuration of the cover walls 1.5, 1.6 results from a cross-sectional two-legged construction with legs 1.5b, 1.5c and 1.6b, 1.6c, which include an obtuse angle α before pressing. The side walls 1.7, 1.8 and the legs 1.5b, 1.6b are arranged in pairs at a slightly obtuse angle to each other. As a result, zakkenartige projections 3 'are formed by the side walls 1.7, 1.8 and the legs 1.5c, 1.6c (Fig. 6a).

Bei seitlicher Druckbeaufschlagung legen sich die Schenkel 1.5c, 1.6c unter Verkleinerung des Winkels α (Fig. 6a) bis auf ca. 90° (Winkel α'; Fig. 6b) an die Seitenwände 1.7, 1.8 an, wobei wiederum die lichten Abstände zwischen den Seitenwänden 1.7, 1.8 und zwischen den Deckwänden 1.5, 1.6 bzw. deren Schenkeln 1.5b, 1.6b abnehmen, so dass sich erfindungsgemäß Funktionselemente (hier nicht gezeigt) im Inneren 1.1 des Profilrohrs 1 verspannen lassen. Die Vorsprünge 3" der Figur 6b, die sich aus den Vorsprüngen 3' der Fig. 6a ergeben, lassen sich als Rippenelemente (vgl. Bezugszeichen 3 in Fig. 1) auffassen und einsetzen.When lateral pressure is applied, the legs 1.5c, 1.6c, reducing the angle α (Fig. 6a) to about 90 ° (angle α ', Fig. 6b) to the side walls 1.7, 1.8, in turn, the clearances between the side walls 1.7, 1.8 and between the top walls 1.5, 1.6 or their legs 1.5b, 1.6b decrease, so that according to the invention functional elements (not shown here) can be tense in the interior 1.1 of the profile tube 1. The protrusions 3 "of FIG. 6b, which result from the protrusions 3 'of FIG. 6a, can be understood and used as rib elements (see reference 3 in FIG.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Profilrohrsection tube
1.11.1
Innenrauminner space
1.2, 1.31.2, 1.3
eingezogener Deckwand-BereichRetracted top wall area
1.41.4
freier Raumbereichfree space area
1.5, 1.61.5, 1.6
Deckwandtop wall
1.5a, 1.6a1.5a, 1.6a
Innenseiteinside
1.5b, c1.5b, c
Schenkelleg
1.6b, c1.6b, c
Schenkelleg
1.7, 1.81.7, 1.8
SeitenwandSide wall
1.91.9
Auswölbungbulge
1.101.10
Hinterschneidungundercut
22
PTC-HeizelementPTC heating element
2.12.1
PTC-WiderstandPTC resistor
2.22.2
Kontaktbahncontact track
2.32.3
Isolierunginsulation
2.42.4
Kontaktrahmencontact frame
33
Rippenelementrib element
3', 3"3 ', 3 "
Vorsprunghead Start
44
Ansatzteil, Metall-LamelleAttachment part, metal lamella
4.14.1
Hauptkörpermain body
4.24.2
Vorsprunghead Start
4.2a, b4.2a, b
BereichArea
4.2c4.2c
Spitzetop
4.2d4.2d
Eckecorner
4.2e4.2e
Abbiegungturn
55
Heizkörperradiator
aa
Abstanddistance
a'a '
Abmessungdimension
bb
Abstanddistance
b'b '
Abmessungdimension
LL
Längelength
PP
Verpressdruckinjection pressure
TT
Tiefedepth
α, α'α, α '
Winkelangle

Claims (16)

  1. Method for bracing functional elements in a hollow receiving means (1) with two at least partly concave cover wall areas (1.5, 1.6) facing one another and the flat sides of the functional elements (2-2.4), characterized in that the functional elements (2-2.4) are braced by pressurizing the further side walls (1.7, 1.8) extending substantially perpendicular to the concave cover wall areas (1.5, 1.6).
  2. Method according to claim 1, characterized in that the side walls (1.7, 1.8) are pressurized substantially in the direction of their surface normal.
  3. Method according to claim 1 or 2, characterized in that through the pressurization there is a reduction to the inside clearance of side walls (1.7, 18) subject to pressurization, the areas of the concave cover walls (1.5, 1.6) approach one another for clamping the functional elements (2-2.4).
  4. Method according to one of the claims 1 to 3, characterized in that through the pressurization a clearance between portions (1.5a, 1.6a, 1.5b, 1.6b) of at least one of the concave cover wall areas (1.5, 1.6) is reduced and between the same is permanently clamped at least one attached piece (4), such as a metal lamina or corrugated rib.
  5. Tube (1) for receiving functional elements, having two at least partly concave cover wall areas (1.2, 1.3) facing one another and the flat sides (2a, 2b) of the functional elements, characterized by further side walls (1.7, 1.8) extending substantially perpendicular to the concave cover wall areas (1.2, 1.3) and which can be pressurized with a pressure (P) for reducing an inside spacing (a) between the concave cover wall areas (1.2, 1.3).
  6. Tube according to claim 5, characterized in that the side walls are pressurizable substantially in the direction of their surface normal.
  7. Tube according to claim 5 or 6, characterized in that through cover walls (1.5, 1.6) of the concave cover wall areas (1.2, 1.3) prior to pressurization (P) is defined an outwardly widening, free space area (1.4) with a cross-sectional essentially corresponding to an equal-sided trapezium.
  8. Tube according to one of the claims 5 to 7, characterized in that the free space area (1.4) is constructed for receiving at least one complimentary end region (4.2) of an attached piece (4), such as a metal lamina or corrugated rib.
  9. Tube according to claim 8, characterized in that the cover walls (1.5, (1.6) of the concave cover wall areas (1.2, 1.3) substantially positively surround the end region (4.2) of attached piece (4) after pressurization (P), so that clamping retention thereof takes place.
  10. Tube according to one of the claims 5 to 8, characterized in that the cover walls (1.5, 1.6) of the concave cover wall areas (1.2, 1.3), following pressurization (P), define undercuts (1.10) for receiving complimentary corner regions (4.2d) of attached piece (4).
  11. Tube according to one of the claims 5 and 6, characterized in that the cover and/or side walls (1.5-1.8) have rib elements (3).
  12. Tube according to claim 11, characterized in that the rib elements (3) have an extension component in the longitudinal direction of tube (1).
  13. Tube according to claim 11 or 12, characterized in that cross-sectionally the rib elements (3) have an extension substantially perpendicular to a local path of the cover and/or side walls (1.5-1.8).
  14. Use of a tube according to one of the claims 5 to 13 for creating a composite device (5) from a plurality of tubes (1) and attached pieces (4) for connecting the same, the attached pieces (4) being retained by the tubes (1).
  15. Use of a tube according to one of the claims 5 to 14 in a heater (5) with an arrangement of heat emission ribs (4).
  16. Heater with an arrangement of heat emission ribs, characterized by a plurality of tubes (1) according to one of the claims 5 to 15.
EP04029778A 2003-12-20 2004-12-16 Tube and process for compression-fitting of functional elements in such a tube Active EP1545157B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360159A DE10360159A1 (en) 2003-12-20 2003-12-20 Profile tube and method for clamping functional elements in such
DE10360159 2003-12-20

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EP1545157A2 EP1545157A2 (en) 2005-06-22
EP1545157A3 EP1545157A3 (en) 2005-10-12
EP1545157B1 true EP1545157B1 (en) 2006-11-22

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US (1) US7332693B2 (en)
EP (1) EP1545157B1 (en)
AT (1) ATE346475T1 (en)
DE (2) DE10360159A1 (en)

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EP2053902A1 (en) * 2007-10-26 2009-04-29 Calsonic Kansei Corporation Electrical heating apparatus, method of manufacturing heat generator unit and pressing jig for use in manufacturing thereof
BRPI0822465B1 (en) * 2008-03-31 2020-09-24 Nippon Steel Corporation SEAMLESS PIPE OR TUBE MANUFACTURING METHOD
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Also Published As

Publication number Publication date
EP1545157A3 (en) 2005-10-12
EP1545157A2 (en) 2005-06-22
ATE346475T1 (en) 2006-12-15
DE10360159A1 (en) 2005-07-21
US7332693B2 (en) 2008-02-19
US20050144896A1 (en) 2005-07-07
DE502004002082D1 (en) 2007-01-04

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